gcc/libjava/java/lang/Byte.java

/* Copyright (C) 1998, 1999  Cygnus Solutions

   This file is part of libgcj.

This software is copyrighted work licensed under the terms of the
Libgcj License.  Please consult the file "LIBGCJ_LICENSE" for
details.  */

package java.lang;

/**
 * @author Per Bothner <bothner@cygnus.com>
 * @date April 17, 1998.  
 */
/* Written using "Java Class Libraries", 2nd edition, plus online
 * API docs for JDK 1.2 beta from http://www.javasoft.com.
 * Status:  Believed complete and correct.
 *	    Includes JDK 1.2 methods.
 */

public final class Byte extends Number implements Comparable
{
  byte value;

  public final static byte MIN_VALUE = -128;
  public final static byte MAX_VALUE = 127;

  // This initialization is seemingly circular, but it is accepted
  // by javac, and is handled specially by gcc.
  public static final Class TYPE = byte.class;

  public Byte(byte value)
  {
    this.value = value;
  }

  public Byte(String str) 
    throws NumberFormatException
  {
    this.value = parseByte(str, 10);
  }

  public byte byteValue()
  {
    return value;
  }

  public short shortValue()
  {
    return value;
  }

  public int intValue()
  {
    return value;
  }

  public long longValue ()
  {
    return value;
  }

  public float floatValue ()
  {
    return (float) value;
  }

  public double doubleValue ()
  {
    return (double) value;
  }

  public static Byte decode(String str)
    throws NumberFormatException
  {
    int i = (Integer.decode(str)).intValue();
    if (i < MIN_VALUE || i > MAX_VALUE)
      throw new NumberFormatException();
    return new Byte((byte) i);
  }

  public static byte parseByte(String str, int radix)
    throws NumberFormatException
  {
    int i = Integer.parseInt(str, radix);
    if (i < MIN_VALUE || i > MAX_VALUE)
      throw new NumberFormatException();
    return (byte) i;
  }

  public static byte parseByte(String str)
    throws NumberFormatException
  {
    return parseByte(str, 10);
  }

  public static Byte valueOf(String str, int radix)
    throws NumberFormatException
  {
    return new Byte(parseByte(str, radix));
  }

  public static Byte valueOf(String str)
    throws NumberFormatException
  {
    return valueOf(str, 10);
  }

  // Added in JDK 1.2
  public int compareTo(Byte anotherByte)
  {
    return this.value - anotherByte.value;
  }

  // Added in JDK 1.2
  public int compareTo(Object o) throws ClassCastException
  {
    if (o instanceof Byte)
      return this.value - ((Byte) o).value;
    else
      throw new ClassCastException();
  }

  public boolean equals(Object obj)
  {
    return obj != null && (obj instanceof Byte) && ((Byte)obj).value == value;
  }

  // Verified that hashCode is returns plain value (see Boolean_1 test).
  public int hashCode()
  {
    return value;
  }

  public String toString()
  {
    return Integer.toString((int) value);
  }

  public static String toString(byte value)
  {
    return Integer.toString((int) value);
  }
}